/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.kie.memorycompiler.resources;

import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.drools.util.PortablePath;

/**
 * A memory based reader to compile from memory
 */
public class MemoryResourceReader implements ResourceReader {
    
    private final Map<PortablePath, byte[]> resources = new ConcurrentHashMap<>();

    private Set<String> modifiedResourcesSinceLastMark;

    public boolean isAvailable( PortablePath path ) {
        return resources.containsKey(path);
    }
    
    public void add( final String resourceName, final byte[] pContent ) {
        PortablePath normalizedName = PortablePath.of(resourceName);
        resources.put(normalizedName, pContent);
        if (modifiedResourcesSinceLastMark != null) {
            modifiedResourcesSinceLastMark.add(normalizedName.asString());
        }
    }
    
    public void remove( PortablePath path ) {
        resources.remove(path);
    }

    public void mark() {
        modifiedResourcesSinceLastMark = new HashSet<>();
    }

    public Collection<String> getModifiedResourcesSinceLastMark() {
        return modifiedResourcesSinceLastMark;
    }

    public byte[] getBytes( PortablePath path ) {
        return resources.get(path);
    }

    public Collection<PortablePath> getFilePaths() {
        return resources.keySet();
    }
}
